1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_CPU_H 3 #define _ASM_X86_CPU_H 4 5 #include <linux/device.h> 6 #include <linux/cpu.h> 7 #include <linux/topology.h> 8 #include <linux/nodemask.h> 9 #include <linux/percpu.h> 10 11 #ifdef CONFIG_SMP 12 13 extern void prefill_possible_map(void); 14 15 #else /* CONFIG_SMP */ 16 17 static inline void prefill_possible_map(void) {} 18 19 #define cpu_physical_id(cpu) boot_cpu_physical_apicid 20 #define cpu_acpi_id(cpu) 0 21 #define safe_smp_processor_id() 0 22 23 #endif /* CONFIG_SMP */ 24 25 struct x86_cpu { 26 struct cpu cpu; 27 }; 28 29 #ifdef CONFIG_HOTPLUG_CPU 30 extern int arch_register_cpu(int num); 31 extern void arch_unregister_cpu(int); 32 extern void start_cpu0(void); 33 #ifdef CONFIG_DEBUG_HOTPLUG_CPU0 34 extern int _debug_hotplug_cpu(int cpu, int action); 35 #endif 36 #endif 37 38 int mwait_usable(const struct cpuinfo_x86 *); 39 40 unsigned int x86_family(unsigned int sig); 41 unsigned int x86_model(unsigned int sig); 42 unsigned int x86_stepping(unsigned int sig); 43 #endif /* _ASM_X86_CPU_H */ 44